Graphite 2 integration lacks hyphenation points compared with non-Graphite fonts and the previous Graphite 1 integration.
See the word "alkotott" (correct hyphenation in Hungarian: al•ko•tott) in the attached PDFs and ODTs (first page of Genesis in Hungarian).
Hyphenation in LibreOffice 3.3
Weak Graphite hyphenation in LibreOffice 3.4
Fix missing hyphenation by character formatting (underline) in LibreOffice 3.4
Source document
I'm sorry Nemethi, I'm not following what this bug is about. I may be blind, but I don't see much difference between the three pdfs. Hyphenation is happening. In addition, graphite doesn't do hyphenation, that's up to the application hyphenation dictionary etc.
Martin, there are not intended artifacts in the hyphenation resulting bigger spacing and worse typography, based on bad calculations of Graphite 2 integration. A quasi indifferent modification of the relevant text (eg. underline the relevant word) can fix a missing hyphenation point in LO 3.4. See on the attached new comparison (artifact.png): good hyphenation in LO 3.3, bad in LO 3.4, fix for one missing hyphenation point in LO 3.4).
Comparison LO 3.3 and LO 3.4 Graphite integration
(Note: this bug doesn't depend on hanging punctuation, only I forgot to switch off it for the screenshots. Without it, the good hyphenation will be "al•kotott" in the example.)
LibreOffice had a problem with the hyphenation of words with punctuation, unfortunatelly, I haven't recognized it before. Likely this issue was related to this problem, too. More information: https://bugs.freedesktop.org/show_bug.cgi?id=56392. Thanks for your help!